CN109030559A - Split-cavity type gas explosion experimental device - Google Patents

Split-cavity type gas explosion experimental device Download PDF

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Publication number
CN109030559A
CN109030559A CN201810711021.2A CN201810711021A CN109030559A CN 109030559 A CN109030559 A CN 109030559A CN 201810711021 A CN201810711021 A CN 201810711021A CN 109030559 A CN109030559 A CN 109030559A
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China
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explosion
chamber enclosure
air
neighbour
cavity
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CN201810711021.2A
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CN109030559B (en
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孙松
王明洋
邱艳宇
赵越堂
高康华
邢化岛
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Army Engineering University of PLA
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Army Engineering University of PLA
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N25/00Investigating or analyzing materials by the use of thermal means
    • G01N25/50Investigating or analyzing materials by the use of thermal means by investigating flash-point; by investigating explosibility
    • G01N25/54Investigating or analyzing materials by the use of thermal means by investigating flash-point; by investigating explosibility by determining explosibility

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
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  • Immunology (AREA)
  • Pathology (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The invention discloses a cavity-divided gas explosion experimental device which comprises a metal explosion tank, an annular partition frame, an explosion venting film, explosion-proof fans and at least 6 spiral sealing covers, wherein the metal explosion tank comprises a combustible gas explosion cavity shell, an air adjacent cavity shell and a top cover, the top of the combustible gas explosion cavity shell is fixedly connected with the top cover, the bottom of the combustible gas explosion cavity shell is fixedly connected with the air adjacent cavity shell, the explosion venting film is fixed on the annular partition frame, a circle of annular bulge is arranged on the inner wall of the air adjacent cavity shell, the annular partition frame is arranged on the annular bulge, the at least two explosion-proof fans are symmetrically arranged in the combustible gas explosion cavity shell, at least 6 mounting holes are uniformly distributed on the combustible gas explosion cavity shell in an annular mode, and each mounting hole is fixedly connected with one spiral sealing cover. The invention can reappear the gas explosion pressure change condition under the closed and limited discharge conditions, has good safety, flexibility and high efficiency, and can be used for the load research of gas explosion and the detection of the explosion discharge component.

Description

Cavity-separating gas burst experimental provision
Technical field
The invention belongs to safety engineering prevention technical fields, and in particular to a kind of cavity-separating gas burst experiment dress It sets.
Background technique
As Gas Energy Source is used widely in people's lives, the gas burst accident in restricted clearance has given people Production and living bring significant damage.It currently, is venting of dust explosion in face of the most-often used method of gas explosion accident in protection design, i.e., The gas to explode in space is released by the breakdown of venting of dust explosion component and is introduced into adjacent room space or external environment.It can be seen that It is of great significance for closed or gas burst load under the conditions of releasing reproduction and research for the protection of gas explosion disaster.Base In this, currently there is an urgent need to a kind of safe and efficient, gas burst experimental provisions of analog various working.
Existing gas burst experimental provision is mostly spherical or cylindrical container, can only generally simulate confined explosion or release quick-fried This single operating condition is fried, and releases and usually gas is released in exterior space, shorter mention is limited the case where releasing.Research Person is main to study pressure change caused by gas burst under different condition by testing in these experiment containers, lacks Convenient for the venting of dust explosion component detection device of industrial application.
It can be seen that existing technical problem is: current experimental provision can only simulate the gas burst under single operating condition Phenomenon lacks safety and convenience.Meanwhile lacking the experiment dress that can easily carry out venting of dust explosion component detection in industrial production It sets.
Summary of the invention
It is an object of the present invention to provide a kind of cavity-separating gas burst experimental provisions, quick-fried for simulating the gas under various working Fried phenomenon, and a kind of venting of dust explosion component detection platform convenient for industrial application is provided, theoretical reference and technology are provided for engineering protection It supports.
The technical solution for realizing the aim of the invention is as follows: a kind of cavity-separating gas burst experimental provision, including metal are quick-fried Fried tank, annular bulkhead, venting of dust explosion film, explosion-proof fan and at least six spirally cover, and the metallic explosive tank includes fuel gas Explode chamber enclosure, air neighbour chamber enclosure and top cover, is connected at the top of flammable gas explosion chamber enclosure with top cover, bottom and air neighbour chamber Shell is connected, and venting of dust explosion film is fixed on annular bulkhead, and air neighbour's chamber enclosure inner wall is equipped with a circle annular protrusion, and annular bulkhead is set It sets on the annular protrusion, at least two explosion-proof fans are symmetricly set in flammable gas explosion chamber enclosure, and fuel gas is quick-fried At least 6 mounting holes are uniformly distributed on fried chamber enclosure in a ring, be connected a spiral capping on each mounting hole.
The flammable gas explosion chamber enclosure, air neighbour's chamber enclosure are cylindrical shape, and the two diameter is equal, air neighbour's chamber enclosure Bottom is sealing plane.
The annular protrusion of the air neighbour chamber enclosure inner wall is located at its top.
The cavity-separating gas burst experimental provision, further includes closed washer, and the closed washer is arranged in combustible gas Body explode chamber enclosure and top cover joint face at and the joint face of flammable gas explosion chamber enclosure and air neighbour chamber enclosure at.
The cavity-separating gas burst experimental provision, further includes damping bed course, damping bed course be located at air neighbour chamber enclosure with Between ground.
Homogeneous fine sand layer and pressure sensor are equipped in the air neighbour chamber enclosure, the thickness of homogeneous fine sand layer is according to experiment It is required that being laid with, for adjusting the volume of air neighbour's chamber air, pressure sensor is embedded in homogeneous fine sand layer top surface.Homogeneous fine sand Layer simultaneously plays a protective role to pressure sensor.
Be equally spaced installation hole in a ring outside the flammable gas explosion chamber enclosure, passes through flange and spiral capping Connection;It is provided with connector in spiral capping, is divided respectively with explosion-proof extraction pump, gas cylinder, pressure vacuum gauge, igniter, concentration Analyzer connection, composition air distribution system, concentration control system and ignition system.
In order to guarantee the safe and reliable of experimentation, metallic explosive tank maximum can resist the explosion overpressure of 1.2MPa.
Compared with prior art, the present invention its remarkable advantage is:
(1) the gas burst experiment of confined gas explosion, the limited various workings such as explosion of releasing can easily be carried out.
(2) more convenient by the volume in the adjustable limited space of releasing of air neighbour's chamber enclosure laid inside sand bed.
(3) the venting of dust explosion film between flammable gas explosion chamber enclosure and air neighbour's chamber enclosure and it is equally distributed on combustible gas Venting of dust explosion mouth of the replaceable spiral cover sealing that body explodes on chamber enclosure equivalent to increase diversified forms keeps experiment more safety high Effect.
(4) detection for being designed as venting of dust explosion component of air neighbour chamber provides space, can be used as this experimental provision and is convenient for The venting of dust explosion component detection platform of industrial application.
Detailed description of the invention
Fig. 1 is the overall structure diagram of cavity-separating gas burst experimental provision of the present invention.
Fig. 2 is the top view (removing top cover) of cavity-separating gas burst experimental provision of the present invention.
Wherein 1. metallic explosive tank;2. damping bed course;3. pedestal;4. homogeneous fine sand layer;5. pressure sensor;6. closed Bed course;7. bolt connection piece;8. spiral capping;9. top cover;10. hook;11. venting of dust explosion film;12. flange;13. explosion-proof wind Fan;14. explosion-proof extraction pump;15. pressure vacuum gauge;16. igniter;17. concentration analyzer;18. gas cylinder;19. annular bulkhead; 20. flammable gas explosion chamber enclosure;21. air neighbour's chamber enclosure
Specific embodiment
Present invention is further described in detail with reference to the accompanying drawing.
A kind of cavity-separating gas burst experimental provision combined with Figure 1 and Figure 2, including metallic explosive tank 1, annular bulkhead 19, let out Quick-fried film 11, explosion-proof fan 13 and at least six spirally cover 8.The metallic explosive tank 1 includes flammable gas explosion chamber enclosure 20, air neighbour chamber enclosure 21 and top cover 9, flammable gas explosion chamber enclosure 20, air neighbour chamber enclosure 21 and top cover 9 are along circumferential direction It is evenly distributed with bolt mouth.
Flammable gas explosion chamber enclosure 20 and air neighbour chamber enclosure 21 are cylindrical shape, and the two diameter is equal.Fuel gas Explosion 20 bottom of chamber enclosure is connected by screw bolts with air neighbour chamber enclosure 21, and junction is covered with cyclic annular closed bed course 6, guarantees experiment Air-tightness in the process.20 bottom of flammable gas explosion chamber enclosure is connected by screw bolts with air neighbour chamber enclosure 21 in experimentation It no longer dismantles afterwards.
Flammable gas explosion chamber enclosure 20 is equal with 9 diameter of circular top cover, and the two is connected by screw bolts, and junction is covered with ring The closed bed course 6 of shape guarantees air-tightness and safety in experimentation.
Hook 10 is welded at 9 upper center of top cover facilitates lifting to move.Be required to sling top cover 9 after experiment every time with Replace the venting of dust explosion film 11 in annular bulkhead 19.
21 bottom of air neighbour chamber enclosure is sealing plane, and bottom is equipped with pedestal 3 to guarantee the steady of metal blasting pot 1, and Mitigate the pressure to ground.It is equipped with damping bed course 2 between the pedestal 3 and bottom surface of 21 bottom of air neighbour chamber enclosure, to reduce The vibration of metallic explosive tank 1 in experimentation, while reducing the damage to ground.
The homogeneous fine sand layer 4 of different-thickness is laid with inside air neighbour chamber enclosure 21 according to experiment demand.Pressure sensor 5 buries It is located inside layer of sand 4, top surface and sand bed flush.Homogeneous fine sand layer 4 is same adjustment 21 internal capacity of air neighbour chamber enclosure When can also play a protective role to pressure sensor 5.
Flammable gas explosion chamber enclosure 20, air neighbour chamber enclosure 21 and top cover 9 are made of high duty metal, and maximum can support The explosion overpressure of anti-1.2MPa.
It is welded with a ring shape metal bump at the top of 21 inner wall of air neighbour chamber enclosure, annular bulkhead 19 lies in a horizontal plane in annular In protrusion, fixed using itself self weight, protrusion is equipped with closed bed course, basis on annular bulkhead 19 with 19 contact position of annular bulkhead The venting of dust explosion film 11 that experiment demand is covered with different disruptive pressures separates two cavitys.
Annular bulkhead 19 divides for the sub- frame of upper layer and lower layer, is evenly distributed with bolt mouth along annular perimeter, will let out in operating process Quick-fried film 11 is clipped between the sub- frame of upper layer and lower layer, and blending bolt tightens the sub- frame of upper layer and lower layer.The upper straton frame of annular bulkhead 19 Upper surface uniform welding there are four hook, it is mobile for the lifting that carries out in experimentation annular bulkhead 19.
Two explosion-proof fans 13 are at least symmetrical arranged inside flammable gas explosion chamber enclosure 20.Explosion-proof fan 13 passes through steel On 20 inner wall of flammable gas explosion chamber enclosure, wind direction is horizontally disposed for silk binding.
Be equally spaced at least six installation hole in a ring outside flammable gas explosion chamber enclosure 20, and each installing port is logical Flange 12 is crossed to connect with spiral capping 8.8 centers of spiral capping are provided with spiral connector, with explosion-proof extraction pump 14, gas cylinder 18, pressure vacuum gauge 15, concentration analyzer 17 form air distribution system.It is tied on the connector that 8 centers of spiral capping open up close Sealed adhesive tape, it is close using latex after being connect with explosion-proof extraction pump 14, gas cylinder 18, pressure vacuum gauge 15,17 spiral of concentration analyzer Envelope guarantees air-tightness.Gas cylinder 18 is sent fuel gas to flammable gas explosion chamber enclosure 20 by elongated air inlet pipe, elongated Gather tiny air inlet in air inlet pipe, can guarantee the uniformity of internal gas concentration in conjunction with explosion-proof fan 13.
A spiral capping 8 outside flammable gas explosion chamber enclosure 20 connect composition igniting system with igniter spiral System, igniter head of igniter head device go deep into inside flammable gas explosion chamber enclosure 20 lighting a fire, can be selected according to experiment demand Spark ignition head or hot-wire ignition head.
The operating procedure of cavity-separating gas burst experimental provision of the present invention is as follows:
Flammable gas explosion chamber enclosure 20, air neighbour chamber enclosure 21 and top cover 9 are lifted to specified place, and use spiral shell by step 1 Tether fitting 7 flammable gas explosion chamber enclosure 20 is connect with air neighbour chamber enclosure 21 it is integral.
Step 2, according to experiment demand in the homogeneous fine sand layer 4 of 21 laid inside different-thickness of air neighbour chamber enclosure, will press Force snesor 5 is embedded in wherein, 5 surface of sensor and 4 flush of sand bed.It according to demand can be by venting of dust explosion component water to be tested It is flat on sand bed 4.
Step 3, the upper layer and lower layer that the venting of dust explosion film 11 of different disruptive pressures is clipped in annular bulkhead 19 according to experiment demand It between sub- frame, and will be tightened along the equally distributed bolt of perimeter of annular bulkhead 19, become venting of dust explosion film 11 with annular bulkhead 19 It is whole.The annular frame 19 with venting of dust explosion film is placed in the annular protrusion of 21 top inner wall of air neighbour chamber enclosure using gantry crane On, closed bed course is equipped between protrusion and annular frame 19.
Step 4 binds explosion-proof fan 13 in 20 inner wall of flammable gas explosion chamber enclosure using iron wire, will using gantry crane Top cover 9 is hung on flammable gas explosion chamber enclosure 20, and benefit is joined with bolts.
Hole in step 5,20 cavity of flammable gas explosion chamber enclosure passes through flange and the spiral capping 8 with hole Connection.8 centers of spiral capping are provided with spiral connector, respectively with explosion-proof extraction pump 14, gas cylinder 18, pressure vacuum gauge 15, dense Degree analyzer 17 is connect with igniter 16.Latex sealing is smeared in each interface after connection.Explosion-proof extraction pump is first opened when experiment 14 will be evacuated to negative pressure inside flammable gas explosion chamber 20, be then shut off aspiration pump, open 18 air inlet of gas cylinder, concentration is by vacuum pressure Table 15, concentration analyzer 17 control.
Step 6 closes air distribution system after reaching prescribed concentration, the spiral capping 8 connecting with air distribution system is removed, root It factually tests demand and changes the capping of totally-enclosed or the looping snail spiral cover with venting of dust explosion film into.
Step 7 opens binding in the explosion-proof fan 13 of 20 inner wall of flammable gas explosion chamber.Fan is closed after 3 minutes, by one A hole is connect by spirally capping 8 with igniter 16, personnel and gas cylinder position, igniting experiments.
In conclusion the present invention is able to carry out the multiple gases explosion test under the conditions of closed and different ventings of dust explosion, and it is used for The detection of industrial venting of dust explosion component, has preferable safety and convenience.

Claims (8)

1. a kind of cavity-separating gas burst experimental provision, it is characterised in that: including metallic explosive tank (1), annular bulkhead (19), let out Quick-fried film (11), explosion-proof fan (13) and at least six spirally cover (8), and the metallic explosive tank (1) includes that fuel gas is quick-fried Fried chamber enclosure (20), air neighbour chamber enclosure (21) and top cover (9), flammable gas explosion chamber enclosure (20) top and top cover (9) are solid Even, bottom and air neighbour chamber enclosure (21) are connected, and venting of dust explosion film (11) is fixed on annular bulkhead (19), air neighbour's chamber enclosure (21) inner wall is equipped with a circle annular protrusion, and annular bulkhead (19) is arranged on the annular protrusion, at least two explosion-proof fans (13) it is symmetricly set in flammable gas explosion chamber enclosure (20), flammable gas explosion chamber enclosure is uniformly distributed in a ring on (20) At least six mounting hole, be connected on each mounting hole a spiral capping (8).
2. cavity-separating gas burst experimental provision according to claim 1, it is characterised in that: the flammable gas explosion chamber Shell (20), air neighbour chamber enclosure (21) are cylindrical shape, and the two diameter is equal, and air neighbour chamber enclosure (21) bottom is that sealing is flat Face.
3. cavity-separating gas burst experimental provision according to claim 1, it is characterised in that: the air neighbour chamber enclosure (21) annular protrusion of inner wall is located at its top.
4. cavity-separating gas burst experimental provision according to claim 1, it is characterised in that: it further include closed washer (6), The closed washer (6) is arranged at the joint face of flammable gas explosion chamber enclosure (20) and top cover (9) and fuel gas is quick-fried At the joint face of fried chamber enclosure (20) and air neighbour chamber enclosure (21).
5. cavity-separating gas burst experimental provision according to claim 1, it is characterised in that: it further include damping bed course (2), Damping bed course (2) is located between air neighbour chamber enclosure (21) and ground.
6. cavity-separating gas burst experimental provision according to claim 1, it is characterised in that: the air neighbour chamber enclosure (21) homogeneous fine sand layer (4) and pressure sensor (5) are equipped in, the thickness of homogeneous fine sand layer (4) is laid with according to requirement of experiment, is used The volume of air neighbour chamber (21) interior air is adjusted, pressure sensor (5) is embedded in homogeneous fine sand layer (4) top surface;Homogeneous fine sand Layer (4) simultaneously plays a protective role to pressure sensor (5).
7. cavity-separating gas burst experimental provision according to claim 1, it is characterised in that: the flammable gas explosion chamber Be equally spaced installation hole in a ring outside shell (20), is connect by flange with spiral capping (8);Spiral capping (8) On be provided with connector, connect respectively with explosion-proof extraction pump, gas cylinder, pressure vacuum gauge, igniter, concentration analyzer, composition is matched Gas system, concentration control system and ignition system.
8. cavity-separating gas burst experimental provision according to claim 1, it is characterised in that: in order to guarantee experimentation Securely and reliably, the maximum explosion overpressure that can resist 1.2MPa of metallic explosive tank (1).
CN201810711021.2A 2018-07-03 2018-07-03 Cavity-separated gas explosion experimental device Active CN109030559B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6223473B1 (en) * 1999-09-10 2001-05-01 Cid Associates, Inc. Explosion relief system including an explosion relief panel and a blast shaft having two openings
JP2014521478A (en) * 2011-08-16 2014-08-28 シーアン ジェイ アンド アール ファイヤー ファイティング エクイップメント カンパニー リミテッド Explosion relief method for aerosol fire extinguishing equipment
CN105928978A (en) * 2016-04-20 2016-09-07 中国石油化工股份有限公司 Testing apparatus for burning and explosion of combustible gas in narrow, long and restricted space
CN106382470A (en) * 2015-08-27 2017-02-08 南京工业大学 Explosion suppression and explosion venting dual protection device for communicating container
CN207198074U (en) * 2017-07-25 2018-04-06 公安部天津消防研究所 A kind of restricted clearance fires simulation and elongnated building, datonation-inhibition experiment porch
CN208833701U (en) * 2018-07-03 2019-05-07 中国人民解放军陆军工程大学 Split-cavity type gas explosion experimental device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6223473B1 (en) * 1999-09-10 2001-05-01 Cid Associates, Inc. Explosion relief system including an explosion relief panel and a blast shaft having two openings
JP2014521478A (en) * 2011-08-16 2014-08-28 シーアン ジェイ アンド アール ファイヤー ファイティング エクイップメント カンパニー リミテッド Explosion relief method for aerosol fire extinguishing equipment
CN106382470A (en) * 2015-08-27 2017-02-08 南京工业大学 Explosion suppression and explosion venting dual protection device for communicating container
CN105928978A (en) * 2016-04-20 2016-09-07 中国石油化工股份有限公司 Testing apparatus for burning and explosion of combustible gas in narrow, long and restricted space
CN207198074U (en) * 2017-07-25 2018-04-06 公安部天津消防研究所 A kind of restricted clearance fires simulation and elongnated building, datonation-inhibition experiment porch
CN208833701U (en) * 2018-07-03 2019-05-07 中国人民解放军陆军工程大学 Split-cavity type gas explosion experimental device

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
SONG SUN等: "Effect of vent conditions on internal overpressure time-history during a vented explosion", 《JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES》, pages 85 - 92 *
尤明伟;蒋军成;喻源;王志荣;: "泄爆面积对连通容器预混气体泄爆影响的实验研究", 实验流体力学, no. 05, pages 53 - 56 *
陈晔等: "受限空间氢泄爆过程压力计算方法研究", 《消防理论研究》, pages 160 - 163 *
高康华等: "建筑物内气体爆炸效应简化计算研究综述", 《爆炸与冲击》, pages 443 - 454 *

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